Myanmar’s transport system is often described as ‘developing’ which tells you all you need to know, although it is quite easy to get around if you are just going to stick to the main tourist path.
Much of the country can be accessed by buses although many of these are in poor condition and the driving is not of a high standard. They are however usually one of the cheaper options but prices can climb around holiday periods and depending on which company you choose. If book with a larger company then the buses may be in better condition so it’s best to check the actual bus you will be travelling on before you pay.
There is a functioning railway system in Myanmar but the schedules are often not followed and the trains are not in excellent condition. Still, this can be a picturesque way to see the country if you don’t mind sacrificing comfort for the experience. Just expect it to be very bumpy.
Domestic airlines in Myanmar are also difficult and delays and cancellations are common making them an unreliable way of getting around, particularly if you have somewhere you need to be on a specific day. As with all transportation in Myanmar, the best bet is to schedule a few days either side of your travel plans in case things go wrong.